Correct sentence

Which of the following sentences are correctly used?

(i) I complained to the customer service representative.

(ii) He complained of not sleeping well.

(iii) I received your complaint of 22 September 2011.

(iv) I received your complaint on 22 September 2011.

Choose one answer.

a. (i) and (iv)

b. All the above

c. (i), (ii) and (iv)

d. (i) and (ii)

i think (i) and (iv) is correct but im not sure (ii) is correct or not..

So, the answer is A or C?